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892天前<?php |
/* |
more & original php framwork |
copyright (c) 2007 - 2008 ismole inc. |
$id: mooseccode.class.php 38 2008-03-19 07:39:17z aming $ |
*/ |
!defined('IN_MOOPHP') && exit('Access Denied'); |
class MooSeccode { |
//note:生成的验证码 |
var $cecCode = ''; |
//note:生成的图片 |
var $codeImage = ''; |
//note:干扰素 |
var $disturColor = ''; |
//note:验证码的图片宽度 |
var $codeImageWidth = '80'; |
//note:验证码的图片高度 |
var $codeImageHeight = '20'; |
//note:验证码位数 |
var $cecCodeNum = 4; |
|
/** |
* 输出头部 |
* |
*/ |
function outHeader() { |
header("content-type: image/png"); |
} |
|
/** |
* 生成验证码 |
* |
*/ |
function createCode() { |
$this->cecCode = strtoupper(substr(md5(rand()),0,$this->cecCodeNum)); |
return $this->cecCode; |
} |
/** |
* 生成验证码图片 |
* |
*/ |
function createImage() { |
$this->codeImage = @imagecreate($this->codeImageWidth,$this->codeImageHeight); |
imagecolorallocate($this->codeImage, 200, 200, 200); |
return $this->codeImage; |
} |
|
/** |
* 加入图片干拢素 |
* |
*/ |
function setDisturbColor() { |
for ($i=0; $i<=128; $i++) { |
$this->disturColor = imagecolorallocate($this->codeImage, rand(0,255), rand(0,255), rand(0,255)); |
imagesetpixel($this->codeImage,rand(2,128),rand(2,38),$this->disturColor); |
} |
} |
/** |
* 设置验证码图片的大小 |
* |
* @param integer $width： |
* @param integer $height： |
* @return boolean; |
*/ |
function setCodeImage($width, $height) { |
if($width == '' || $height == '') { return false; } |
$this->codeImageWidth = $width; |
$this->codeImageHeight = $height; |
return true; |
} |
/** |
* 在图片上写入验证码 |
* |
* @param integer $num |
*/ |
function writeCodeToImage($num = '') { |
if($num != '') {$this->cecCodeNum = $num;} |
for($i = 0; $i <= $this->cecCodeNum; $i++) { |
$bg_color = imagecolorallocate ($this->codeImage, rand(0,255), rand(0,128), rand(0,255)); |
$x = floor($this->codeImageWidth / $this->cecCodeNum) * $i; |
$y = rand(0,$this->codeImageHeight - 15); |
imagechar($this->codeImage, 5, $x, $y, $this->cecCode[$i], $bg_color); |
} |
} |
|
/** |
* 把验证码的值写入session |
* |
* @param string $sname |
*/ |
function writeSession($sname) { |
session_start(); |
session_register($sname); |
$_SESSION[$sname] = md5($this->cecCode); |
} |
/** |
* 输出验证码图片 |
* |
* @param integer $width |
* @param integer $height |
* @param integer $num |
* @param string $sname |
*/ |
function outCodeImage($width = '', $height = '' ,$num = '', $sname = 'code') { |
if($width !== '' || $height !== '') { |
$this->setCodeImage($width, $height); |
} |
$this->outHeader(); |
$this->createCode(); |
$this->createImage(); |
$this->setDisturbColor(); |
$this->writeCodeToImage($num); |
$this->writeSession($sname); |
imagepng($this->codeImage); |
imagedestroy($this->codeImage); |
} |
} |
